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Finding the Fourth Proportional to 28,401.40, 42,602.10 and 13,602.70

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Solution

The fourth proportional to 28,401.40, 42,602.10 and 13,602.70 is: 20,404.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,401.40 : 42,602.10 = 13,602.70 : x
  2. Step 2: Convert to fraction form
    28,401.40/42,602.10 = 13,602.70/x
  3. Step 3: Cross multiply
    28,401.40x = 42,602.10 × 13,602.70
  4. Step 4: Simplify right side
    28,401.40x = 579,503,585.67
  5. Step 5: Solve for x
    x = 579,503,585.67/28,401.40
  6. Step 6: Final answer
    x = 20,404.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.